Home / 420,054.35-579,505.63-243,128.36

Finding the Fourth Proportional to 420,054.35, 579,505.63 and 243,128.36

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Solution

The fourth proportional to 420,054.35, 579,505.63 and 243,128.36 is: 335,419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,054.35 : 579,505.63 = 243,128.36 : x
  2. Step 2: Convert to fraction form
    420,054.35/579,505.63 = 243,128.36/x
  3. Step 3: Cross multiply
    420,054.35x = 579,505.63 × 243,128.36
  4. Step 4: Simplify right side
    420,054.35x = 140,894,253,432.67
  5. Step 5: Solve for x
    x = 140,894,253,432.67/420,054.35
  6. Step 6: Final answer
    x = 335,419.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.